In reply to Wolfgang Hötzel.

The subtitles are added automatically by YouTube, I'm not sure why those ones aren't available, sorry. The repeated session (on Wednesdays) has the subtitles: https://www.youtube.com/watch?v=pgHdCjSZR8A&list=PLoyaeouPUsdvkddjiq-hZZGAJ5h_NtRZE&index=4